水驱油微观孔隙内流场分析

Analysis of Flow Field in Microscopic Pore of Water Displacing Oil

目前大多数油田进入高含水期,针对如何继续提高原油采收率这一问题,考虑了压力梯度、流道宽度、油膜高度、油水之间的界面张力、原油黏度等对流场内的速度分布、应力分布的影响。选用等温情况下广义牛顿流体本构方程,建立了水在微观孔隙空间流动的流动方程,运用Polyflow对模型进行数值计算。结果表明:压力梯度越大,油膜高度越大,油水之间界面张力越小时,驱油效率越高。

At present, most of the oil fields have already in high water cut period, for the problem of enhancing oil recovery, pressure gradient, the width of the runner, the height of the film of oil, the interracial tension between oil and water, and the impact of viscosity on the effect of velocity distribution, stress distribution are considered. The constitutional equation of generalized Newtonian fluid under the isothermal condition is used, and the flow equation of the water is set up, which can describe the flow of the wates flow in the microscopic pores. A numerical simulation for the model is carried out by using Polyflow. The result shows that there are more pressure gradient and the height of the film and oil, the interfacial tension between oil and water is small, there is better displacement efficiency.